Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 150gr | Peregrine Glider (Glider GRM) bullet and 88 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Alliant Reloder-26 and Norma MRP.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 56,594 psi | 89% | 3068 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 54,505 psi | 85% | 3087 fps | 98.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 57,217 psi | 90% | 3196 fps | 99.7% |
| Accurate 4064 | <<locked>> | 84% | 57,159 psi | 90% | 3130 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,071 psi | 86% | 3189 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 54,723 psi | 86% | 3281 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 86% | 57,595 psi | 90% | 3169 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,405 psi | 88% | 3238 fps | 98.1% |
| ADI AR 2213 | <<locked>> | 98% | 54,186 psi | 85% | 3228 fps | 96.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,595 psi | 90% | 3304 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 56,608 psi | 89% | 3235 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,795 psi | 86% | 3136 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,042 psi | 86% | 3163 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,985 psi | 88% | 3251 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,566 psi | 90% | 3278 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,811 psi | 87% | 3225 fps | 98% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,087 psi | 89% | 3287 fps | 98.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,027 psi | 85% | 3212 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,688 psi | 73% | 3123 fps | 99.2% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,302 psi | 85% | 3297 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,141 psi | 82% | 3196 fps | 97.4% |
| Bofors RP3 | <<locked>> | 84% | 55,608 psi | 87% | 3150 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,087 psi | 89% | 3287 fps | 98.4% |
| Bofors RP7 | <<locked>> | 88% | 55,056 psi | 86% | 3136 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 84% | 55,999 psi | 88% | 3169 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 57,537 psi | 90% | 3251 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 88% | 56,927 psi | 89% | 3205 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,942 psi | 89% | 3215 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,376 psi | 88% | 3169 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,609 psi | 90% | 3212 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,730 psi | 72% | 3159 fps | 96.6% |
| Hodgdon Superformance | <<locked>> | 88% | 53,969 psi | 85% | 3215 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,361 psi | 57% | 2014 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,753 psi | 89% | 3150 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,927 psi | 88% | 3133 fps | 99.1% |
| IMR 4350 | <<locked>> | 92% | 56,420 psi | 88% | 3173 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,768 psi | 89% | 3166 fps | 99.1% |
| IMR 4831 | <<locked>> | 92% | 55,535 psi | 87% | 3179 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,463 psi | 88% | 3189 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,637 psi | 87% | 3159 fps | 96.3% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,390 psi | 87% | 3264 fps | 96.8% |
| Lovex S062 | <<locked>> | 84% | 56,971 psi | 89% | 3140 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,942 psi | 89% | 3163 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 54,766 psi | 86% | 3150 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,181 psi | 74% | 3022 fps | 98.5% |
| Norma 203B | <<locked>> | 82% | 54,346 psi | 85% | 3146 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,537 psi | 90% | 3232 fps | 98.1% |
| Norma MRP | <<locked>> | 98% | 57,029 psi | 89% | 3317 fps | 99.3% |
| Norma URP | <<locked>> | 92% | 57,580 psi | 90% | 3235 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,361 psi | 87% | 3169 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,898 psi | 88% | 3284 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 92% | 56,536 psi | 89% | 3232 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,951 psi | 78% | 3136 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,057 psi | 58% | 2064 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,999 psi | 88% | 3153 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 57,058 psi | 89% | 3271 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,274 psi | 87% | 3215 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,725 psi | 90% | 3307 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,992 psi | 72% | 3153 fps | 97.8% |
| Rottweil R 902 | <<locked>> | 82% | 55,361 psi | 87% | 3100 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,883 psi | 88% | 3150 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,215 psi | 85% | 3143 fps | 96.6% |
| Rottweil R 905 | <<locked>> | 96% | 54,911 psi | 86% | 3209 fps | 98% |
| Rottweil R 907 | <<locked>> | 88% | 55,056 psi | 86% | 3136 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,942 psi | 89% | 3163 fps | 99.8% |
| Shooters World Precision | <<locked>> | 84% | 56,971 psi | 89% | 3140 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,766 psi | 86% | 3150 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,624 psi | 90% | 3212 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,637 psi | 89% | 3028 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,695 psi | 89% | 3114 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,447 psi | 85% | 3202 fps | 97.9% |
| Somchem S355 | <<locked>> | 86% | 55,608 psi | 87% | 3143 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 56,159 psi | 88% | 3136 fps | 96.2% |
| Somchem S365 | <<locked>> | 94% | 57,435 psi | 90% | 3235 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,593 psi | 87% | 3179 fps | 98.7% |
| Vihtavuori N135 | <<locked>> | 82% | 55,738 psi | 87% | 3054 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,188 psi | 88% | 3074 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,188 psi | 90% | 3120 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,941 psi | 88% | 3169 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,129 psi | 86% | 3156 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 82% | 54,302 psi | 85% | 3064 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,027 psi | 86% | 3169 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 98% | 56,188 psi | 88% | 3235 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 57,145 psi | 90% | 3304 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,782 psi | 87% | 3130 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,537 psi | 90% | 3251 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,893 psi | 78% | 3274 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,912 psi | 88% | 3176 fps | 98% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 52,982 psi | 83% | 3015 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,039 psi | 80% | 3025 fps | 97.8% |
| Accurate 3100 | <<locked>> | 88% | 37,347 psi | 59% | 2808 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 50,256 psi | 79% | 3018 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,551 psi | 60% | 2864 fps | 97.9% |
| Accurate High Country | <<locked>> | 92% | 47,485 psi | 74% | 3140 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 47,514 psi | 74% | 2995 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 46,079 psi | 72% | 3041 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 96% | 50,502 psi | 79% | 3156 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,447 psi | 84% | 3235 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 46,238 psi | 72% | 3041 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,240 psi | 76% | 3022 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,488 psi | 81% | 3100 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,623 psi | 59% | 2881 fps | 98% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,946 psi | 67% | 3018 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 45,701 psi | 72% | 3031 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 43,207 psi | 68% | 3018 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,383 psi | 43% | 2589 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 92% | 35,708 psi | 56% | 2858 fps | 96% |
| Alliant Reloder-26 | 79.4 gr | 84% | 34,258 psi | 54% | 2854 fps | 96.1% |
| Bofors RP15 | <<locked>> | 96% | 45,513 psi | 71% | 3064 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 48,602 psi | 76% | 3035 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 43,207 psi | 68% | 3018 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 42,496 psi | 67% | 2887 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 48,878 psi | 77% | 3045 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 40,669 psi | 64% | 2917 fps | 95.9% |
| Hodgdon H4350 | <<locked>> | 80% | 43,685 psi | 68% | 2949 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,069 psi | 83% | 3146 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,041 psi | 55% | 2759 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,635 psi | 84% | 3150 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 42,699 psi | 67% | 3084 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 39,769 psi | 62% | 2927 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,137 psi | 43% | 1804 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,980 psi | 78% | 3035 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,388 psi | 82% | 3071 fps | 98.6% |
| IMR 4350 | <<locked>> | 82% | 40,857 psi | 64% | 2867 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,135 psi | 69% | 2927 fps | 96.9% |
| IMR 4831 | <<locked>> | 80% | 37,014 psi | 58% | 2812 fps | 97.6% |
| IMR 4895 | <<locked>> | 80% | 52,823 psi | 83% | 3130 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 52,257 psi | 82% | 3097 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 98% | 51,561 psi | 81% | 3192 fps | 95.9% |
| Lovex S062 | <<locked>> | 80% | 50,212 psi | 79% | 3028 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,423 psi | 65% | 2867 fps | 97.5% |
| Lovex S070 | <<locked>> | 80% | 39,581 psi | 62% | 2841 fps | 95.8% |
| Lovex S071 | <<locked>> | 92% | 36,143 psi | 57% | 2779 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 50,807 psi | 80% | 3084 fps | 100% |
| Norma 204 | <<locked>> | 86% | 46,586 psi | 73% | 3028 fps | 95.7% |
| Norma MRP | 80.7 gr | 88% | 39,566 psi | 62% | 2963 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 38,363 psi | 60% | 2858 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 80% | 51,576 psi | 81% | 3110 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 48,211 psi | 76% | 3133 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 37,347 psi | 59% | 2841 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 96% | 42,830 psi | 67% | 2989 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,528 psi | 43% | 1847 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,907 psi | 77% | 3028 fps | 98.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,658 psi | 72% | 3081 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,624 psi | 61% | 2884 fps | 97.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,420 psi | 59% | 2890 fps | 97% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 39,639 psi | 62% | 2992 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 51,967 psi | 81% | 3045 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,542 psi | 71% | 2969 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 50,850 psi | 80% | 3081 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 90% | 44,759 psi | 70% | 3012 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 42,496 psi | 67% | 2887 fps | 95.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,423 psi | 65% | 2867 fps | 97.5% |
| Shooters World Precision | <<locked>> | 80% | 50,212 psi | 79% | 3028 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,581 psi | 62% | 2841 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,108 psi | 74% | 3031 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,847 psi | 73% | 2877 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,625 psi | 64% | 2808 fps | 96.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 44,367 psi | 70% | 3005 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 45,934 psi | 72% | 2972 fps | 99.9% |
| Somchem S361 | <<locked>> | 92% | 52,388 psi | 82% | 3068 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 34,867 psi | 55% | 2808 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 42,424 psi | 66% | 2927 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 80% | 52,402 psi | 82% | 3005 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,562 psi | 82% | 3018 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,830 psi | 69% | 2894 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,842 psi | 62% | 2861 fps | 98.1% |
| Vihtavuori N165 | <<locked>> | 92% | 41,829 psi | 66% | 2900 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 50,865 psi | 80% | 3009 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,262 psi | 62% | 2858 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 80% | 30,255 psi | 47% | 2674 fps | 95.4% |
| Vihtavuori N560 | 88 gr | 96% | 53,055 psi | 83% | 3232 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,030 psi | 61% | 2828 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 40,843 psi | 64% | 2920 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 84% | 27,644 psi | 43% | 2687 fps | 96.3% |
| Winchester Supreme 780 | <<locked>> | 92% | 45,078 psi | 71% | 2976 fps | 95.5% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 88 powders for .300 Norma Mag. loaded with the .308 | 150gr | Peregrine Glider (Glider GRM). Norma MRP delivers the highest muzzle velocity at 3,317 fps; across all powders the maximum-charge window runs from 2,014 fps to 3,317 fps. Accurate 3100 gives the best case fill at 100 %, and 88 of the 88 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, Alliant Reloder-23 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Vihtavuori N560, Alliant Reloder-26, Norma MRP rank at the top here: for .300 Norma Mag. with the .308 | 150gr | Peregrine Glider (Glider GRM) they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.